naked / default rider 183 cm
Kawasaki Z400 vs Yamaha XJ6 N ergonomics
Kawasaki Z400 and Yamaha XJ6 N have modeled posture scores within three points for the 183 cm default rider. Treat this as a planning estimate; posture preference, data confidence, and a real test sit still matter.
Modeled fit comparison
Kawasaki Z400
All contacts reached
Yamaha XJ6 N
All contacts reached
The modeled scores are within three points, so the result does not distinguish a higher-scoring bike. Treat the result as a planning estimate and compare each bike's geometry confidence before a real test sit.
Rider fit: reaching the ground
The Kawasaki Z400 lists a 785 mm seat; the Yamaha XJ6 N lists 785 mm, within a few millimetres of each other. Seat height is only a first-pass ground-reach input. It does not establish safety or actual foot contact. Seat width, suspension sag, boots, mobility, load, and individual proportions can materially change the result.
Geometry snapshot
| Spec | Kawasaki Z400 | Yamaha XJ6 N |
|---|---|---|
| Seat height | 785 mm | 785 mm |
| Wheelbase | 1,370 mm | 1,440 mm |
| Wet weight | 168 kg | 205 kg |
| Displacement | 399 cc | 600 cc |
Posture metrics
Knee angle
- Kawasaki Z400
- Sport (61.4 deg)
- Yamaha XJ6 N
- Sport (61.7 deg)
Hip angle
- Kawasaki Z400
- Neutral (93.4 deg)
- Yamaha XJ6 N
- Neutral (91.7 deg)
Elbow angle
- Kawasaki Z400
- Relaxed (143.3 deg)
- Yamaha XJ6 N
- Relaxed (143.3 deg)
Torso lean
- Kawasaki Z400
- Neutral (11.6 deg)
- Yamaha XJ6 N
- Neutral (12.7 deg)